Immergas DIM 2 ZONE ERP - DIM Connection to Another DIM or to Hercules Zone Kit with Hydraulics in Series

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3-16
3-17
INSTALLERUSER
MAINTENANCE TECHNICIAN
3.11 DIM CONNECTION TO ANOTHER DIM OR TO HERCULES ZONE KIT WITH HYDRAULICS IN SERIES.
Example of hydraulic diagram for connection in series of 2 DIM.
With two DIM connected to each other in series,
connect the central heating request of the second
DIM to the HT input of the rst one on the zone in
which it has been connected.
In the example, it is supposed that the second DIM is
connected on the output of zone 2 of the rst DIM.
All considerations shown in this layout are valid
also if a DIM is connected to a Hercules kW boiler
with zone kit.
e rst DIM will be connected to the boiler via zone
signal state or IMG BUS (where permitted) and it
can receive the value of the external probe from the
boiler only if the IMG BUS interaction is available.
e LT zone ow temperature of the rst DIM will
be set on Superior kW boilers connected via IMG
BUS, or on DIM zone control unit trimmers when
the same is connected to boilers dierent to Superior
kW or does not use the IMG BUS communication.
e second DIM receives only the zone signal state
from the rst DIM and it must be connected to an
external probe (if required); the relative ow tem-
perature of LT zones of the second DIM must be
adjusted on its trimmers.
Key:
S20-1.1 - Zone 1 room thermostat 1st DIM
S20-1.3 - Zone 3 room thermostat 1st DIM
S20-2.1 - Zone 1 room thermostat 2nd DIM
S20-2.2 - Zone 2 room thermostat 2nd DIM
S20-2.3 - Zone 3 room thermostat 2nd DIM
ZONES CONTROL
UNIT 2nd DIM V2
ZONES CONTROL UNIT 1st DIM V2
or kW Hercules kit zones control unit
External probe
(optional)
External probe
(optional)
External probe
(optional)
BOILER
1st DIM V2 3 ZONES 1st DIM v2 A-2BT
Zones
control unit
DIM V2
Zones
control unit
DIM V2
Zone 2 2nd DIMZone 3 1st DIM Zone 3 2nd DIMZone 1 1st DIM Zone 1 2nd DIM